General description 8pcs Shower Door Roller Set consisting of 4 top rollers and 4 bottom rollers, designed for sliding glass shower doors, shower cubicle doors, massage cubicle doors, or sliding furniture fittings. The set includes screws and plastic covers for easy installation. Technical specifications Wheel diameter: 25mm Wheel width: 6mm Maximum glass thickness: 6mm Distance from the center of the mounting hole to the edge of the glass: 18mm Material: Brass and ABS plastic Usage The shower door rollers are easy to move and install, keeping the door balanced and allowing it to slide with minimal effort. Other information Includes 4 upper shower door rollers, 4 lower shower door rollers, and 8 plastic covers.